Bug 1256558 - Disable C4311 to unblock compilation on VS2015; r?peterv As part of unblocking building with VS2015u1 in automation, I'm mass disabling compiler warnings that are turned into errors. This is not the preferred mechanism to fix compilation warnings. So hopefully this patch never lands because someone insists on fixing the underlying problem instead. But if it does land, hopefully the workaround is only temporary. MozReview-Commit-ID: 3TbgVPRb8Uo

--- a/parser/expat/lib/moz.build
+++ b/parser/expat/lib/moz.build
@@ -13,8 +13,14 @@ SOURCES += [
     'xmlparse.c',
     'xmlrole.c',
     'xmltok.c',
 ]
 
 FINAL_LIBRARY = 'gkmedias'
 
 DEFINES['HAVE_EXPAT_CONFIG_H'] = True
+
+if CONFIG['_MSC_VER']:
+    # This is intended as a temporary hack to support building with VS2015.
+    # 'type cast': pointer truncation from 'const char *' to 'unsigned long'
+    CFLAGS += ['-wd4311']
+